Zuko and Azula grew across multiple seasons. They were fundamentally tied to Aang, his journey, his friends and each other. Lot of drama, lot of agency, lot of interesting situations.
Amon had the swagger, but never fundamentally tied into Korra's journey like he should have. And then he is forgotten immediately after.
Oh well, 48 minutes of Legend of Korra left, y'all. I'm hoping for the best finale of the series.
We have a giant mech that shoots laser beams
We are getting S2-shit tier finale for sure
And yes TOA, S2 is awful so don't bother with the GIF